Marathon RJ-250VL, RJ-88SC, RJ-100SC, RJ-250SC installation manual Pump Makes NOISE-SOUNDS

2 MAINTENANCE

TROUBLE-SHOOTING CHART 2-16

PROBLEM	CAUSE	SOLUTION
PUMP MAKES NOISE-SOUNDS	( 1 ) Partly clogged intake strainer or	( 1A) Pump must receive intake fluid freely or
LIKE GRAVEL	restricted intake pipe	cavitation results. Drain system, clean
		intake pipe and clean or replace strain-
		er
	( 2) Defective bearing	( 2A) Replace pump
	( 3) Air leak at pump intake pipe joints	( 3A) Tighten joints as required.
PUMP SHAFT SEAL LEAKING	( 1) Seal worn or damaged	( 1A) Replace seals or pump.
EXCESSIVE HEAT	( 1) Continuous running	( 1A) When over 140 degrees F or hot in
		comparison with circuit lines, pump
		should be shut down immediately.
		Before restarting, insure that fluid cool-
		ing capacity is adequate to remove sys-
		tem generated heat.
		( 1B) Install oil cooler (air or water type)
		( 1C) Install oil temperature shut down switch
		( 1D) Check to be sure CYCON Power Pack
		has not been exchanged for Pressure
		Shifting Power Pack.
	( 2) Undersized hydraulic lines	( 2A) Replace with larger hydraulic lines
	( 3) High ambient temp in relation to	( 3A) Use lower viscosity oil
	oil temp.
	( 4) Excessive system leakage	( 4A) Check system for bypassing or
		leaks
RAPID WEAR	( 1) Abrasive matter in the hydraulic oil being	( 1A) Install adequate filter or clean.
	circulated through pump	( 1B) Replace oil more often and clean tank
	( 2) Viscosity of oil too low at working	( 2A) Replace oil with factory recommended .
	conditions
	( 3) Pressure too high	( 3A) Reduce pump pressures to factory
		specifications.
	( 4) Air recirculation causing pump noise	( 4A) Tighten all fittings.
ERRATIC OPERATION	( 1) Valve sticking or binding	( 1A) Disassemble & clean as necessary
	( 2) Viscosity of oil too high	( 2A) Change oil to factory recommended vis-
		cosity
	( 3) Air in system	( 3A) Check for leaks, tighten fittings
	( 4) Low oil	( 4A) Fill reservoir with oil
	( 5) Low voltage	( 5A) Check primary & secondary sides of
		transformer for correct voltage.
OVERLOADS TRIP FREQUENTLY		( 1A) Check for correct voltage (incoming
		power.)
		( 1B) Check fuses or breakers at disconnect
		( 1C) Check heater elements to be sure they
		are tight
		( 1D) Check wiring from starter to motor to
		make sure all connections are tight
		( 1E) Check motor leads to be sure all con-
		nections are tight surges or voltage
		NOTE: Excessive overload tripping and/or
		motor or coil failures may occur if voltage
		surges or voltage drops are frequent in your
		area. This circumstance can be remedied by
		the installation of phase protectors which drop
		power to the motor if surges are present.